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[Federal Register Volume 89, Number 245 (Friday, December 20, 2024)]
[Notices]
[Pages 104151-104152]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2024-30507]

[[Page 104151]]

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ENVIRONMENTAL PROTECTION AGENCY

[EPA-HQ-OAR-2023-0460; FRL-11946-03-OAR]

Release of Volumes 1 and 2 of the Integrated Review Plan for the 
National Ambient Air Quality Standards for Ozone and Related 
Photochemical Oxidants

AGENCY: Environmental Protection Agency (EPA).

ACTION: Notice of availability and public comment period.

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SUMMARY: On or about December 20, 2024, the Environmental Protection 
Agency (EPA) is making available to the public Volumes 1 and 2 of the 
Integrated Review Plan for the National Ambient Air Quality Standards 
for Ozone and Related Photochemical Oxidants (IRP). The national 
ambient air quality standards (NAAQS) from photochemical oxidants are 
set to protect public health and public welfare from these pollutants 
in ambient air. Volume 1 of the IRP contains contextual background 
material for the current review of the air quality criteria and the 
NAAQS. Volume 2 identifies policy-relevant issues in the review and 
describes key considerations in the EPA's development of the Integrated 
Science Assessment (ISA). The ISA provides the scientific basis for the 
EPA's decisions, in conjunction with additional technical and policy 
assessments, for the review of the NAAQS, as described in sections 108 
and 109 of the Clean Air Act.

DATES: Comments must be received on or before January 21, 2025.

ADDRESSES: You may send comments on Volume 2 of the IRP, identified by 
Docket ID No. EPA-HQ-OAR-2023-0460, by any of the following methods:
     Federal eRulemaking Portal: https://www.regulations.gov/ 
(our preferred method). Follow the online instructions for submitting 
comments.
     Mail: U.S. Environmental Protection Agency, EPA Docket 
Center, Office of Air and Radiation Docket, Mail Code 28221T, 1200 
Pennsylvania Avenue NW, Washington, DC 20460.
     Hand Delivery or Courier: EPA Docket Center, WJC West 
Building, Room 3334, 1301 Constitution Avenue NW, Washington, DC 20004. 
The Docket Center's hours of operation are 8:30 a.m.-4:30 p.m., Monday-
Friday (except Federal Holidays).
    Instructions: All submissions received must include the Docket ID 
No. for this notice. Comments received may be posted without change to 
https://www.regulations.gov, including any personal information 
provided. For detailed instructions on sending comments, see the 
SUPPLEMENTARY INFORMATION section of this document. The two volumes 
described here will be available on the EPA's website at https://www.epa.gov/naaqs/ozone-o3-air-quality-standards. The documents will be 
accessible under ``Planning Documents'' for the current review.

FOR FURTHER INFORMATION CONTACT: Dr. Mary Hutson, Office of Air Quality 
Planning and Standards, (Mail Code C504-06), U.S. Environmental 
Protection Agency, 109 T.W. Alexander Drive, P.O. Box 12055, Research 
Triangle Park, NC 27711; telephone number: 919-541-0715; or email: 
[email protected].

SUPPLEMENTARY INFORMATION:

I. General Information

Written Comments

    Submit your comments, identified by Docket ID No. EPA-HQ-OAR-2023-
0460, at https://www.regulations.gov (our preferred method), or the 
other methods identified in the ADDRESSES section. Once submitted, 
comments cannot be edited or removed from the docket. The EPA may 
publish any comment received to its public docket. Do not submit to 
EPA's docket at https://www.regulations.gov any information you 
consider Confidential Business Information (CBI), Proprietary Business 
Information (PBI), or other information whose disclosure is restricted 
by statute. Multimedia submissions (audio, video, etc.) must be 
accompanied by a written comment. The written comment is considered the 
official comment and should include a discussion of all points you wish 
to make. The EPA will generally not consider comments or comment 
contents located outside of the primary submission (i.e., on the web, 
cloud, or other file sharing system). Please visit https://www.epa.gov/dockets/commenting-epa-dockets for additional submission methods; the 
full EPA public comment policy; information about CBI, PBI, or 
multimedia submissions; and general guidance on making effective 
comments.

II. Information About the Documents

    Two sections of the Clean Air Act (CAA or the Act) govern the 
establishment and revision of the NAAQS. Section 108 directs the 
Administrator to identify and list certain air pollutants and then 
issue ``air quality criteria'' for those pollutants. The air quality 
criteria are to ``accurately reflect the latest scientific knowledge 
useful in indicating the kind and extent of all identifiable effects on 
public health or welfare which may be expected from the presence of 
such pollutant in the ambient air . . .'' (CAA section 108(a)(2)). 
Under section 109 of the Act, the EPA is then to establish primary 
(health-based) and secondary (welfare-based) NAAQS for each pollutant 
for which the EPA has issued air quality criteria. Section 109(d)(1) of 
the Act requires periodic review and, if appropriate, revision of 
existing air quality criteria. Revised air quality criteria are to 
reflect advances in scientific knowledge on the effects of the 
pollutant on public health and welfare. Under the same provision, the 
EPA is also to periodically review and, if appropriate, revise the 
NAAQS based on the revised air quality criteria.
    The Act additionally requires the appointment of an independent 
scientific review committee that is to periodically review the existing 
air quality criteria and NAAQS and to recommend any new standards and 
revisions of existing criteria and standards as may be appropriate (CAA 
section 109(d)(2)(A)-(B)). Since the early 1980s, the Clean Air 
Scientific Advisory Committee (CASAC) has fulfilled the requirement for 
an independent scientific review committee.
    Presently, the EPA is reviewing the air quality criteria and NAAQS 
for O3 and related photochemical oxidants.\1\ The documents 
announced in this notice have been developed as part of the integrated 
review plan (IRP) which is developed in the planning phase for the 
review. The documents have been prepared jointly by the EPA's Center 
for Public Health and Environmental Assessment within the Office of 
Research and Development and the Office of Air Quality Planning and 
Standards within the Office of Air and Radiation. These documents will 
be available on the EPA's website: https://www.epa.gov/naaqs/ozone-o3-air-quality-standards, accessible under ``Planning Documents'' for the 
current review.
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    \1\ The EPA's call for information for this review was issued on 
August 21, 2023 (88 FR 58264).
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    The IRP for the current review of the O3 NAAQS will be 
comprised of three volumes. Volumes 1 and 2 are the subject of this 
notice. Volume 1 provides background information on the air quality 
criteria and O3 NAAQS and may serve as a reference by the 
public and the CASAC in their consideration of the subsequent two 
volumes. Volume 2 addresses the general approach for the review and 
planning for the integrated

[[Page 104152]]

science assessment (ISA). Comments are solicited from the public on 
Volume 2, which will also be the subject of a consultation with the 
CASAC Ozone Panel, to be announced in a separate Federal Register 
notice. This volume identifies policy-relevant issues in the review and 
describes key considerations in the EPA's development of the ISA. 
Volume 3, which is not yet completed, is the planning document for 
quantitative analyses to be considered in the policy assessment (PA), 
including exposure and risk analyses, as warranted. In order that 
consideration of the availability of new evidence in the review can 
inform these plans, the development and public availability of Volume 3 
will generally coincide with that of the draft ISA, and it will be the 
subject of a consultation with the CASAC Ozone Panel at that time. 
These documents do not represent and should not be construed to 
represent any final EPA policy, viewpoint, or determination.
    As described above, comments on Volume 2 of the IRP should be 
submitted to the docket by January 21, 2025. A separate Federal 
Register notice will provide details about the CASAC Ozone Panel 
consultation meeting and the process for public participation in the 
consultation. The EPA will consider the consultation comments and 
public comments on the IRP, Volume 2, in preparation of the ISA for 
O3 and related photochemical oxidants. Volume 1 of the IRP, 
also being made available, provides background or contextual and 
historical material for this NAAQS review.

Erika N. Sasser,
Director, Health and Environmental Impacts Division.
[FR Doc. 2024-30507 Filed 12-19-24; 8:45 am]
BILLING CODE 6560-50-P
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